Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide
作者:Tomokazu Tsuji、Antonius Andre Zaoputra、Yutaka Hitomi、Kaoru Mieda、Takashi Ogura、Yoshihito Shiota、Kazunari Yoshizawa、Hiroyasu Sato、Masahito Kodera
DOI:10.1002/anie.201702291
日期:2017.6.26
A dicopper(II) complex, stabilized by the bis(tpa) ligand 1,2‐bis[2‐[bis(2‐pyridylmethyl)aminomethyl]‐6‐pyridyl]ethane (6‐hpa), [Cu2(μ‐OH)(6‐hpa)]3+, was synthesized and structurally characterized. This complex catalyzed selective hydroxylation of benzene to phenol using H2O2, thus attaining large turnover numbers (TONs) and high H2O2 efficiency. The TON after 40 hours for the phenol production exceeded
一种双铜(II)络合物,由双(tpa)配体1,2-双[2- [双(2-吡啶基甲基)氨基甲基] -6-吡啶基]乙烷(6-hpa)稳定,[Cu 2(μ- OH)(6-hpa)] 3+,并进行结构表征。该络合物使用H 2 O 2催化苯选择性羟基化为苯酚,从而获得较大的周转数(TONs)和高H 2 O 2效率。在50℃,N 2下的MeCN中,苯酚生产40小时后的TON超过12000 ,这是均相络合物催化H 2 O 2苯羟基化的最高值。苯转化率为22%时,苯酚(95.2%)和p产生了苯醌(4.8%)。提出了H 2 O 2活化和苯羟基化的机理。